Crossword Genius

Turn crazy in shock (4)

Ross

I believe the answer is:

stun

'shock' is the definition.
(both can mean to surprise)

'turn crazy' is the wordplay.
'turn' is a reversal indicator.
'crazy' becomes 'nuts' (nuts can informally mean crazy or mad).
'nuts' in reverse letter order is 'STUN'.

'in' acts as a link.

(Other definitions for stun that I've seen before include "Shock, flabbergast" , "'Shock, daze (4)'" , "deliver a knock-out blow" , "Confuse" , "Put out for the count" .)

I've seen this clue in The Telegraph and The Globe and Mail.
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